![Amazon.com : SHIMANO Ultegra Di2 Junction Box One Color, Internal/SM-JC41 : Bike Drivetrain Accessories : Sports & Outdoors Amazon.com : SHIMANO Ultegra Di2 Junction Box One Color, Internal/SM-JC41 : Bike Drivetrain Accessories : Sports & Outdoors](https://m.media-amazon.com/images/I/61xisKZz1QL._AC_UF1000,1000_QL80_.jpg)
Amazon.com : SHIMANO Ultegra Di2 Junction Box One Color, Internal/SM-JC41 : Bike Drivetrain Accessories : Sports & Outdoors
![Shimano Dura Ace Ultegra Ew Rs910 Junction For Bar / Frame Sm-jc41 Junction Box For Di2 Internal - Electric Bicycle Accessories - AliExpress Shimano Dura Ace Ultegra Ew Rs910 Junction For Bar / Frame Sm-jc41 Junction Box For Di2 Internal - Electric Bicycle Accessories - AliExpress](https://ae01.alicdn.com/kf/H2fa78cefc53448aab186ee1dd84d6bfcf.jpg)
Shimano Dura Ace Ultegra Ew Rs910 Junction For Bar / Frame Sm-jc41 Junction Box For Di2 Internal - Electric Bicycle Accessories - AliExpress
![Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port - Angry Catfish | Minneapolis Bike Shop + Coffee Bar Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port - Angry Catfish | Minneapolis Bike Shop + Coffee Bar](https://www.sefiles.net/merchant/5203/images/large/CY6762.jpg)